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std::exception::operator=

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exception& operator=( const exception& other ) throw();
(until C++11)
exception& operator=( const exception& other ) noexcept;
(since C++11)

Copy assignment operator. Assigns the contents of other

The effects of calling what() after assignment are implementation-defined.

(until C++11)

If *this and other both have dynamic type std::exception then std::strcmp(what(), other.what()) == 0 after assignment.

(since C++11)

[edit] Parameters

other - another exception to assign the contents of